The Timken Company
The Timken Company
4500 Mt Pleasant St. NW
N. Canton, OH 44720
Phone: (234) 262-3000
E-Mail: CustomerCAD@timken.com • Web site: www.timken.com
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  • Additional radial load-carrying capability compared to single-row product.
  • Designed to ISO/DIN specified interchangeable dimensions.
  • Sold as complete assembly.

NNU-1
  • Outer rings with solid ribs.
  • Lubrication grooves and holes on outer rings.
  • One solid brass cage.

The radial internal clearance (RIC) for the bearing assembly must be included when ordering the complete assembly.
Unit of Measure

Key Dimensions

Bore (d)

 N/A 320.000 mm

O.D. (D)

 N/A 540 mm21.2598 in

Width (B)

 N/A 218 mm8.5827 in
Dynamic Radial Load Rating - 1M Revs (C1)1 N/A 3940000 N886000 lbf

Other Dimensions

DUR/DOR F/E

 N/A 375 mm14.7638 in

Max Shaft Fillet Radius LF ID

 N/A 0.200 in5 mm

Max Shaft Fillet Radius RF ID

 N/A 0.200 in5 mm

Max Housing Fillet Radius LF OD

 N/A 0.2 in5 mm

Max Housing Fillet Radius RF OD

 N/A 0.2 in5 mm

Shaft Backing Shoulder Diameter

 N/A 365 mm14.3700 in

Housing Backing Shoulder Diameter

 N/A 495 mm19.49 in

Ratings

Static Radial Load Rating (C0)

 N/A 6280000 N1410000 lbf

Thermal Reference Speed - Oil 

 N/A 590 rpm

Thermal Reference Speed - Grease 

 N/A 550 rpm

Lubrication Data

Lubrication Groove g

 N/A 19.3 mm0.76 in

Lubrication Hole Diameter h

 N/A 9.5 mm0.37 in

Number of Lubrication Holes

 N/A 10
Dimension S2 N/A 8.80 mm0.350 in

Factors

Geometry Factor (Cg) 3 N/A 0.2420
  • 1 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 2 Permissible axial displacement from normal position of one bearing ring in relation to the other.
  • 3 Cg factor for bearing without inner ring.